Tent-head fixture for inhalational therapy



May 10, 1932- Y. HENDERSON ET AL TENT HEAD FIXTURE FOR INHALATIONALTHERAPY Filed NOV.22, v3.930

Patented May 10, 1932 UNITED STATES PATENTgj-QFFICE YANDELL HENDERSON,OIF NEW HAVEN, ANI)r HOWARD W. HAGGARD, F WOODIBVIB'IDGE,v

'l CONNECTICUT 't f TENT-HEAD FIXTURE FOR INHALATIONAL '.HERAPY`application mea November 22, 1930. seria; No. 497,379.

Our invention relates to a tent-head fixture for use in inhalationaloxygentherapy, whether the oxygen be fused alone'or mixed with othergases (particularly carbonl diox "f ide) iny the treatment oflpneumonia, as-y phyxia, and other disorders in which the respiration ofair mixed with oxygen, or oxygen and other gases, is a therapeuticadvantage, the object being to produce a-unitary 0 inhalationalapparatusconstructed with particular reference to simplicity andcompactness, convenience of transportation andoperation, installationwithout loss of time, and efficacy in use.

5 With these ends in view, our invention con# sists in an inhalationaltent-head fixture chiefly characterized'by-` the installation of thevinjector and the refrigerating means in it to form a unitarystructuretobe transported, handled and operated as such.

Our invention further consists in an in halational tent-head fixturecharacterized as above and lhavingcertain details kof construction andcombinationfof parts as will the claims.

In the accompanying drawings: Y

F l is a View in elevationf of our improved inhalational tent-headfixture' for 0 treating pneumonia, asphyxia, fand allied conditions,with portions of the tent broken away; f f

Fig. 2 is a plan view thereof; and

ing the use of ordinary water-ice.

In the particular embodiment of our yin-k vention herein shown anddescribed, vthe inj ector consists of a threaded nozzlelO adjustablymounted in ayerticallyarranged tubular casing 11 toA which oxygenalone,` under pressure, or oxygenmixed withgother gases underpressure,risled'fro1n any lconvenient acoil 13. The injector-casing` 11is lformed at its lowervend `with a flange 14. 'by means of which it isrigidly mounted upon Ithe closed,- fiat, upper end of [an upstanding,downwardly-opening, circular mixing-chamber 15 having in its said upperend a! central be hereinafter set forth and pointed'out in` Fig. 3 is aView of the head in vertical cen-V tral section on the line 3-3 of Fig.1, show-fl source of supplyby a g`as-pipef124 comprising j Water-ice 21fills the annular chamber surf rounding the mixing-chamber 1 5,kas-shown in F ig. 3.@v The -g'asepipe 12 is ylocatedwithin thischamber, upon the bottom of which its coil =13f rests and is thereforeVbroughty into directcontact with the watereice l21, which is introducedinto thefcontainer 2() through a removablecover 22 having ahandle 23 anda depending annular flange 24 Vfitting snugly l into a largecircular'opening 25 formed in a horizontal rim 26 secured to theupperedge of the ice-container 20 and projecting in# wardly'andoutwardlylover the same. The

outerv edge of' the said yrim 26 rests upon an annular flange27turnedinwardly from the upper edge of the cylindrical body 28 Aofthefixture, whereby the said ice-container 20-` is' suspended therein,there being sufl'icientdi'f-vr f ference between the vdiameter and depthof I the ice-container and body'to form an annularco'oling'chamber 29between their sides' and a cooling-space 30 between their bottoms. Forconvenience, the ice-container is provided just within its upperfedgewith swingingbail-like handle 31 'consisting of a heavy metal rod, theends ofwhich are pivoted in brackets 32 located at opposite pointswithin the container. When not in use, this handleiSsWung down intotheposition in which it is s hown in Fig. 3. On the'removalof the1cover22thehandle may readily be grasped for lifting the container'outof( theRisingcentrally within the mixing-cham-V ber 15 is a funnelv 33, theupper endlofwhich' is centered with respect to the-projecting lower endofx the nozzle 1 0 of the injector,

while the flaring lower end of the funnel 33 opens downwardly into thetent 34 through a central opening 35 formed in the bottom of the body28, the edges of the laring portion of the funnel' being secured asshown to the ,edges ofthe opening 35 as at 36.

Fory the admissionV of the expired air of the l patient from the tent 34into the annular cooling-chamber 29, the body 28 has formed init aycircular band Vof air-portsBlr through which the expired air is drawninto the' saidV cooling-chamber k29, thence through the airspace 30,thence upwardY through a'n annular;

passage 38 between the Haring lower end of the funnel 33 and the lowerend ofthe downwardly-opening mixing-chamber vwhich risescentrally withinthe ice-container of which itforms a part, suchI circulation of theexpired airbeing induced! bythe draft created by the injector l() whichdischarges into the top of the mixing-chamber. 15.' The moisture carriedby the expired air of the patient as thus circulated and cooled, conthecup-likepad may be poured or., drawn off. or soaked up by aY spongeor'cloth.A 'The pa'd'39-also yprevents moistureY in the air exhaledbythefpatient from condensing upon.

' the lower surf-ace of the bottom ofthe body andV dropping uponthe faceof the patient.v Y Y The tent, whichv may be vof any approvedconstruction andI which is provided,A as usual, with one ormoreobservation-openings 40, is heldl away from the body 28j of the fixture'so asxtoV providea freepassage 41 for' the expired' air in the tentinto the port-hol`es 37v the body,by1a rectangularl frame 42 towhichtheuppergportion of the tent is secured. i Above theV said frame 42the tent is provided'with an annular band 43 ofthe tent-cloth fitting'snuglyaroundthe body at a point above'the saidfp'orts and clasped uponAthefbody by af band 44-f`ormed at "its-ends' with perforatedl ears45-45- receiving a clamping-V fixture is suspended, as

" shown,. by three spaced brackets 47 secured tothe tOpL-Otthe'bOdyf,providing for the atTV Y tachment ofsprings48 secured to'afhorizontal "fsuspension-bar 49, but the particular means:

o fsuspendingA our 4fixture ormsnopartf of` ourfinvention and may bevariedA according" to convenience. Y

It will be seen from the Yii'oregoing-idescripf` tion that ,under-ourinvention-the injectorl and refrigerating-means, i. e., theyice-container, areinstalledwithin the tent-head fixture itn self,.the'said tentfheadfbeing, in effect, a unitary structure.;V f

*ff 1 Y Oxygen alone, for oxygen mixed with another gas or gases(preferably carbon dioxide, which promotes deep breathing), according tothe treatment indicated, is supplied through the gas-pipe l2 .from anyconvenient source of supply and under any desired pressure. In itspassage through the pipe 172, the gasis cooled prior toits admissioninto the injector, from the nozzle l() of which it is sprayed into theupper endrof the mixingchamber and intol the `funnel 33", creating sucha; suction as to draw the exhaled air of the patient from the tent 34upwardthrough the'passage 41 and thence"through the ports into thecooling-chamber 29 where it ycomes in contact with the exterior surfacesor sides of the water-.icecontainer 20, thence downward into-thecooling-,space 30, where itis further cooled by Contact `with the bot-'tomzof theuice-container -20`,fthence upward through the annularpassage'38 around the" Haring lower end of. the funnel/3,3 into themixing.-chamberl-,t where itisffurther cooledand drawn over the topofthe funnel 33. and downwardV vthrough the same,z from which it is'discharged in- -theorml of a breeze, `so to speak, into the 'face ofthe patient.\ A s the cooled and," therefore, driedor' dehydratedexhaled -air isdrawni intothe funnel, it is mixed with the gas from the.injector,the

'commin'gling of theair'andgas being continued in the funnel'upj to Ithetime ofthe discharge of vthe, mixture. therefrom. c

. -Bylocatingv the injector 'andrefrigeraty ing-1neans,l,whatev er theiry (specific character and arrangement, within'the tent-headA proper,.the practice. 'of, inhalational Y oxygen therapy isgreatly simpliedandmade Inuchj more'convenient thanwith prior devices, in which theinjectionfmeans and refrigeratingmeans have been located exteriorto thetenthead and indirectly connected therewith,.such prior devices beingclumsy totransport and manipulate and requiring much more space, oftenvbeing in the way ofaccess totthebedsideof the patient. v`

We would have it understood that in practicing our invention,fchangesmay be made in the tenthead fixture herein shown and 'de-` scribed,without vdepartin'gfrom our essential invention,which :is characterizedby making the inj ector. and refrigeratingfmeans Vorganic' 'features ofthe-fixtlqlre.-Y i w 1'. A- tent-'head'- ixtur #for inhalationaltherapyhaving rva body,' a removable 'ice-f container loca-ted therein, amixing-chamber rising within" the saidvce-container, an in-` jectorc'oordinatedfwith" theL said mixing'-i -ch'ambenmeans forsupplying'gasto the' in- Y jector, andl aT unr'iely located Vwithin themifxA ingchamber and opening downward through thehead, wherebythefexpired air is drawnv through the "head, and cooledthereinl andIthence e ,into Athe Y g mixinghamber .and dis;-z

charged from the funnel, by the suction created by the said injector.

2. A tent-head fixture for inhalational therapy having a body providedwith airports, an ice-container suspended within the body, from thesides and bottom of which it is separated by cooling-spaces, amixingchamber surrounded by the ice-container and opening downward, aninjector coordinated with the mixing-chamber, and means for supplyinggas to the injector, whereby the expired air is drawn from the tentthrough the said ports into the said cooling-spaces and thence into themixing-chamber, from which it is discharged, by the suction created bythe injector.

3. A tent-head fixture for inhalational therapy having a body providedwith ports, an ice-container suspended within the body, from the sidesof which it is separated by a cooling-chamber, a mixing-chambersurrounded by the ice-container and communicating with the saidcooling-chamber, an injector coordinated with the mixing-chamber, meansfor supplying gas to the injector, whereby the expired air is subjectedto the action of ythe cooling-chamber and thence drawn into themixing-chamber by the suction createdby the injector, and means forinsulating the bottom of the body from the ice-container andcooling-chamber.

4. A tent-head fixture for inhalational therapy having a body providedwith ports, a funnel rising within the center of the body and openingdownwardly therethrough, an ice-container set within the body andsmaller in diameter than the same to form an annularV cooling-chamberbetween them, a mixingchamber located within the ice-container andforming a part thereof, an injector mounted in the mixing-chamber, meansfor supplying gasto the injector, whereby the expired air is drawnthrough the said ports. into the cooling-chamberV and thence into themixingchamber and funnel by the suction created by the injector.

5. A tent-head fixture for inhalational therapy having a body providedwith airports, a funnel rising from the center of the body and openingdownward therethrough, an ice-container located within the body anddimensioned for producing cooling-chambers between the sides and bottomof the same, a centrally-located mixing-chamber rising within theice-container and carried thereby, an injector applied to themixing-chamber into which the funnel rises for coaction with theinjector, and a gas-pipe mounted in the ice-container, extendingthereinto and connected with the injector, whereby the expired air isdrawn by the suction created by the said injector from the tentsuspended from the fixture-head through the said ports andcooling-chambers into the mixing-chamber and' funnel-,from which it isdischarged upont-hek patient. v j fr 6. A tent-head fixture forinhalational therapy having a body provided with a series of air-ports,a funnel rising centrally, within the body,fan ice-container within thebody withcooling-spaces between them, a. downn wardl-y-openingmixing-chamber risingcentrally within the ice-container and receivingthe saidfunn'el, an injector mounted upon the top offv themixing-chamber, and means for supplying gas to 4theinjector,- .wherebythe draft produced by the injector draws the expired air through'theports of the body and through the said cooling-spaces into the mix-`ing-chamber and thence into the funnel, from.kk

which it is expelled upon the patient. 7. A tent-headA fixture .forinhalational therapy having a body provided with airports, acentrally-located ydownwardly-,openwith the interior of the said tentfor removing air therefrom and reintroducing the same thereinto;refrigerating-means located in the said head and associated with thesaid air-circulatingpassage inthe tent-head for cooling air passingtherethrough; and a gasinjector opening into the said air-circulatingpassage in the said tent-head in such manner as to cause a forced drafttherethrough to remove air from the said tent for being cooled by thesaid refrigerating-means and to force the now cooled air back into saidtent, plus an admixture of gas from the said gas-injector. v

9. In an apparatus for inhalational therapy, the combination with atent-head; of a tent suspended therefrom; an air-circulating passageprovided in the said head and comcooledfwby? the ysaidrefrigerating-means and returned, plus an admiXture of gas into the 1tent; l

10. In anapparatus for inhalational therapy, the combination With atent-head; of a tent suspended therefrom; anf air-circulating passageprovided in the said head and communicating at its-respective'oppositeends Withtherinterior of the saidltent'forV removing air therefrom andreintroducng the sameV thereinto; refrigerating-means. located inthesaidihead andv associated with the said air-circulating passage in thetent-head for cooling airvpassing therethrough; aV gas-injector openingntothe said air-circulating passage in the said tentshead in such manneras to cause a forced draft therethrough to ref .movecair from'thesaidtent for being cooled by thesaid refrgerating-means and to force the'nowcooled air back into said tent, plus aniadmixture'of gas from thev saidgas-injector; and means for yinsulating the bottom ofthe tent-head,whereby the condensation of' moisture thereupon is prevented.l

In testimony whereof, We have signed this speci'cation'.

' YANDELL-YHENDERSON.

- HOWARD V7. HAGGARD.

